Awọn ferese Brewster ni igbagbogbo lo bi awọn polarizers laarin awọn cavities laser. Nigbati o ba wa ni ipo ni igun Brewster (55° 32′ ni 633 nm), apakan P-polarized ti ina yoo kọja nipasẹ window laisi awọn adanu, lakoko ti ida kan ti apakan S-polarized yoo han ni pipa window Brewster. Nigbati a ba lo ninu iho ina lesa, ferese Brewster ṣe pataki bi polarizer.
Brewster igun ti wa ni fun nipasẹ
tan (θB) = nt/ni
θBni Brewster ká igun
nini awọn Ìwé ti refraction ti awọn isẹlẹ alabọde, ti o jẹ 1.0003 fun air
ntjẹ itọka ifasilẹ ti alabọde gbigbe, eyiti o jẹ 1.45701 fun silica dapo ni 633 nm
Paralight Optics nfunni ni awọn window Brewster ti a ṣe lati N-BK7 (Grade A) tabi silica fused UV, eyiti o ṣe afihan fere ko si fluorescence ti ina lesa (gẹgẹbi iwọn ni 193 nm), ti o jẹ yiyan pipe fun awọn ohun elo lati UV si IR nitosi . Jọwọ wo Aworan atẹle ti o nfihan irisi fun mejeeji S- ati P-polarization nipasẹ UV dapo silica ni 633 nm fun awọn itọkasi rẹ.
N-BK7 tabi UV Fused Silica Substrate
Ibi Ibajẹ Giga (Ti a ko bo)
Ipadanu Irohin Zero fun P-Polarization, 20% Iṣiro fun S-Polarization
Apẹrẹ fun lesa cavities
Ohun elo sobusitireti
N-BK7 (Ite A), UV dapo yanrin
Iru
Ferese lesa Alapin tabi Wedged (yika, onigun mẹrin, ati bẹbẹ lọ)
Iwọn
Ṣiṣe ti aṣa
Ifarada Iwọn
Aṣoju: +0.00/-0.20mm | Itọkasi: + 0.00 / - 0.10mm
Sisanra
Ṣiṣe ti aṣa
Ifarada Sisanra
Aṣoju: +/- 0.20mm | Itọkasi: +/- 0.10mm
Ko Iho
> 90%
Iparapọ
Itọkasi: ≤10 arcsec | Iwọn to gaju: ≤5 arcsec
Didara Dada (Scratch - Ma wà)
Itọkasi: 60 - 40 | Ga konge: 20-10
Dada Flatness @ 633 nm
Òótọ́: ≤ λ/10 | Itọkasi giga: ≤ λ/20
Aṣiṣe Wavefront ti a gbejade
≤ λ/10 @ 632.8 nm
Chamfer
Aabo:<0.5mm x 45°
Aso
Ti a ko bo
Awọn sakani wefulenti
185 - 2100 nm
Alabajẹ Lesa
> 20 J/cm2(20ns, 20Hz, @1064nm)